Locking device for food chopper bowls



y 1940- L. JAENICHEN ET AL 2,208,796

LOCKING DEVICE FOR FOOD CHOPPER BOWLS Filed May 20. 1938 INVENTORS LOUISJAEN'CHEN B WILLIAM BEHM J ,W W ATTORNEYS Patented July 23, 1940 UNITED-STATES PATENT OFFICE LOCKING DEVICE FOR FOOD CHOPPER BOWLS MichiganApplication May 20, 1938, Serial No. 209,144

4 Claims.

The present invention relates to means for securing and locking in placefood chopper bowls upon motor units.

Among the objects of the invention is a device of this kind which may beeasily and quickly operable to securely fix the chopper bowl in place.

Another object is a device which is not only easily operable to unfastenthe bowl but in this operation causes a positive substantial movement ofthe bowl from its locked position.

Still other objects and advantages will be apparent to those skilled inthe art upon reference to the following description and the accompanyingdrawing in which Figure 1 is a section on line l--l of Figure 4.

Figure 2 is a section on line 2-2 of Figure 1.

Figure 3 is also a section on line 2-2 of Figure 1, but showing theparts in a different position.

Figure 4 is a section on line 44 of Figure 1.

Figure 5 is a partial side elevation of the bowl and attaching portionof the motor unit.

Figure 6 is a perspective view of the cooperating active parts of thelocking device.

Figure '7 is a perspective View of another form of the gear member.

In the drawing showing a preferred form of embodiment of the invention,the flanged cover member of a power unit is shown at 10, this beingprovided with a female socket portion H surrounding the end 12 of adrive shaft notched as indicated at l3 for driving connection with theend M of the food chopper screw.

The socket l l is of proper size to receive the reduced end l5 of achopper bowl IE (only partially shown) which reduced end 15 is providedWith a transverse notch near its extremity and upon the side uppermostwhen the bowl [6 is in position for use.

As indicated, the covermember H) is provided with an enlargement in itsupper portion and is bored transversely to receive the locking deviceshown as an assembly in Figure 6.

This device consists of a shaft having fixed,

near one end, as by a pin 26, a toothed member 27 and at its other end ahandle 30, the handle being tiltably mounted by means of a pin 3| andslotted as at 32 to permit a limited tilting. Be-

notch 35a into which a pin a carried by handle The toothed member 21consists of a generally cylindrical element having formed along one sidea single gear tooth 27a adapted to coact with notch 20 which is itselfformed as the space between two gear teeth. Also the pin 26 which fixesthe member 21 to shaft 25, may be extended, as shown, from one side ofmember 2'! to substantially the plane of the cylindrical surface of themember. These parts form in effect a form of rack and pinion, the rackbeing the part l5 and the pinion being the part 21 with, in effect, twoteeth. One tooth is, of course, the tooth 2M and the other the pin 26which acts against the end of part 15. I

Instead of making the gear 2'! in the manner just described, it may alsobe made as indicated in Figure '7. That is, the body portion 21b is cutaway to form a tooth 21a and a shoulder 26a to take the place andfunction of pin 26. This gear 21b may be fixed to shaft 25 by a suitablekey as indicated at 26b.

As indicated best in Figure 4, the relative location of the severalparts is such that, when the member 21 or 212) is rotated clockwise(Figure 4) the tooth 21a will move part l5 of the bowl slightly towardthe left and the pin 26 or shoulder 26a will contact the end of part 15and move it a relatively greater amount.

The operation of the device is simple. When the handle is in the fullline position of Figure 5, the parts are locked. When it is desired toseparate the parts, the handle 33 is tilted, as in Figure 5, to withdrawthe pin. 30 from notch 35a and the handle rotated to the dotted lineposition of Figure 5 or slightly further. This movement partially ejectsthe bowl and permits its easy removal. Insertion of the bowl and returnof the handle to the dotted line position of Figure 5, of course,secures the bowl in position for use.

By making the notch 20 of sufiicient depth to give its bottom suflicientlength and by making member 2'! of suitable length and of such size thatthe tooth 21!; contacts the said bottom, the bowl is securely fixedagainst rotation.

Now having described the invention and the. preferred embodimentthereof,'it is to be understood that said invention is to be limited,not to the specific details herein set forth, but only by the scope ofthe claims which follow.

What I claim is: 1. Means for securing a food chopper bowl to a powerunit consisting of a socket portion on said unit, a reduced portioncarried by said bowl and adapted to fit in said socket, said reducedportion being provided with a transverse notch having a bottom surfacenon-concentric with respect to the axis of said reduced portion, atransversely arranged toothed member extending across said socket andprovided with a tooth adapted to fit into and substantially fillthenotch in said reduced portion, being engageable with both sides ofsaid notch, and swingable into and out of the path of said reducedportion, means for rotating the toothed member whereby to move saidtoothed portion in said notch, and thereby also to move said bowlportion longitudinally in either direction.

2. Means as set forth in claim 1 in which said reduced portion isprovided with an abutment spaced from said notch, and an actuatingporsocket and carrying a single-toothed gear having its tooth conformingin shape to said notch, a fixed bearing block for said shaft, a handlemounted on one end of said shaft adjacent said block and tiltable on anaxis transverse to the axis of said shaft, resilient means between saidblock and gear, and coacting means on said handle and block forpreventing handle rotation, said handle being constructed and arrangedto render, when tilted, said coacting means inoperative to prevent saidrotation.

4. In combination with a power unit provided with a socket for adetachable food chopper bowl, a chopper bowl having a notched portionfitting in said socket, means for fixing the bowl against displacementcomprising a rotatable shaft extending transversely of said socket andcarrying a single-toothed element, a fixed bearing block for said shaft,a handle mounted on one end of said shaft adjacent said block andtiltable on an axis transverse to the axis of said shaft, resilientmeans between said block and gear, and coacting means on said handle andblock for preventing handle rotation, said handle being constructed andarranged to render, when tilted, said coacting means inoperative, thesingle tooth on said toothed element being formed to fit the notch ofsaid bowl to prevent rotation of the bowl in said socket.

LOUIS JAENICHEN. WILLIAM BEHM.

